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Articles

IMMOBILISATION OF NITROGEN IN POTTING MEDIA

Article number

342_14

Pages

121 – 126

Language

Abstract

The Nitrogen Drawdown Index (NDI) is briefly described and two examples of its relevance to fertilizer N use are presented and discussed.

When coir dust was used as a direct replacement for natural peat in soilless potting media, about 10 mg/L medium extra N per week had to be provided to satisfy the requirements of microbial activity.

Philadelphus mexicanus growing in media comprised of mixtures of peat and Pinus radiata bark with NDI₇₅ values ranging from 1.1 to 0 (NDI₁₅₀ value of 0.36), needed weekly fertilizing with solutions with N concentrations ranging from 150 to 550 mg/L for optimum growth.

Publication

International Symposium on Horticultural Substrates other than Soil in situ

Authors

KEVIN A. HANDRECK

Keywords

Full text

https://doi.org/10.17660/ActaHortic.1993.342.14

Online Articles (45)

2. MICROBIAL ACTIVITY IN MEDIA CONTAINING WORM-WORKED DUCK WASTE

W.R. Carlile | D.P. Wilson

3. EFFECTS OF SELF-HEATING ON BIOLOGICAL, CHEMICAL AND PHYSICAL CHARACTERISTICS OF PEAT

G. Wever | M.H. Hertogh-Pon

4. NITROGEN FORM AND SUSCEPTIBILITY OF PELARGONIUM X HORTORUM TO XANTHOMONAS

B. Digat | F. Lemaire

5. THE DISEASE SUPPRESSIVENESS OF LIGHT-COLOURED SPHAGNUM PEAT AND BIOCONTROL OF PLANT DISEASES WITH STREPTOMYCES SP.

R. Tahvonen

6. RX MEDIA – A CONCEPT FOR GROWING PLANTS IN CONTAINERS

F. A. Pokorny

7. THE EFFECT OF SUPPLEMENTARY LIGHT AND ELECTRICAL CONDUCTIVITY ON GROWTH AND QUALITY OF CUT ROSES

H.R. Gislerod | T. Fjeld | L.M. Mortensen

8. THE CONCENTRATION OF NUTRIENTS FOR GROWING ANTHURIUM ANDREANUM IN SUBSTRATE.

C. Sonneveld | W. Voogt

9. A MOVING FRUIT VEGETABLE CROP

E.A. van Os | R.P. van Zuijdam | A.T.M. Hendrix | V.J.M. Koch

10. EFFECTS OF SHORT TERM SUBSTRATE FLOODING ON GASEOUS EXCHANGE OF CARNATION

F.X. Martínez | X. Fàbregas | L. Tapia | A. Caballero

11. RECIRCULATION SYSTEMS FOR GREENHOUSE VEGETABLES

M.R. Hardgrave

12. OXYGEN CONCENTRATION OF NUTRIENT SOLUTION IN MINERAL WOOLS

L.M. Rivière | S. Charpentier | B. Jeannin | B. Kafka

13. PROBLEM SHIFTS INDUCED BY MODIFIED GROWING SUBSTRATES

A. Vanachter | C. Van Assche | E. Van Wambeke

14. VERY LOW MEDIUM MOISTURE TENSION – A FEASIBLE CRITERION FOR IRRIGATION CONTROL OF CONTAINER-GROWN PLANTS

M. Raviv | S. Medina | Y. Shamir | Z. Ner

15. IMMOBILISATION OF NITROGEN IN POTTING MEDIA

KEVIN A. HANDRECK

16. PRODUCTION OF COMPOST IN A HEAT COMPOSTING PLANT AND TEST OF COMPOST MIXTURES AS GROWING MEDIA FOR GREENHOUSE CULTURES.

L. Jespersen | J. Willumsen

17. GROWTH AND YIELD OF TOMATOES AS INFLUENCED BY DIFFERENT SUBSTRATES, SUBSTRATE VOLUMES AND IRRIGATION FREQUENCIES

M.R. Ismail | M.S. Halimi | K. Jusoh

18. THE USE OF COMPOSTED REFUSE AND SEWAGE AS SUBSTRATE ADDITIVES FOR CONTAINER GROWN PLANTS.

Neil C. Bragg | J. A.R. Walker | E. Stentiford

19. LETTUCE SEEDLING GROWTH ON SUBSTRATE MIXES USING PEAT, CORK, FOREST LITTER AND SAND

M. Martorell | M. Soliva | N. Cañameras | F.X. Martínez | M. dos Reis

20. COMPOST IN FLORICULTURE

U. Tomati | E. Galli | R. Buffone | J. Cegarra Rosique | A. Roig

21. AN EVALUATION OF VARIOUS UK METHODS FOR ESTIMATING AIR-FILLED POROSITY WITH SPECIFIC REFERENCE TO PEAT:CAPOGRO WOOL MIXTURES

P.L. Waller | N.C. Bragg | S.K. Rodgers

22. ALTERNATIVE SUBSTRATES FOR POTTED PLANTS

M. Hansen | H. Grønborg | N. Starkey | L. Hansen

23. PROBLEMS & CONSIDERATIONS IN DETERMINING PHYSICAL PROPERTIES OF HORTICULTURAL SUBSTRATES

W. C. Fonteno

24. PHYSICAL PROPERTIES OF PEAT SUBSTRATES IN AN EBB/FLOOD IRRIGATION SYSTEM

P. Michiels | R. Hartmann | C. Coussens

25. PEAT AS A SUBSTRATE FOR YEAR ROUND CHRYSANTHEMUM GROWING

J.B.G.M. Verhagen

26. SHRINKAGE, POROSITY CHARACTERIZATION, AND COMPUTER SIMULATION OF HORTICULTURAL SUBSTRATES

S. Bures | F. A. Pokorny | David P. Landau | Mark A. Farmer | Alan M. Ferrenberg

27. WATER CONTENT MEASUREMENTS WITH NON-DESTRUCTIVE DI-ELECTRICAL METHODS IN ROCKWOOL SUBSTRATES

J.F. de Groot

28. A RAPID METHOD FOR THE DETERMINATION OF PHYSICAL PROPERTIES OF GROWING MEDIA

R. Gabriels | W. Keirsbulck | H. Engels

29. COMPOST AS GROWING MEDIUM: CHEMICAL, PHYSICAL AND BIOLOGICAL ASPECTS

P. Nappi | R. Barberis

30. PHYSICAL AND CHEMICAL PROPERTIES OF FRACTIONATED PEAT

M. Prasad | M.J. Maher

31. IMPROVING NUTRIENT AND MOISTURE RETENTION IN PINE BARK SUBSTRATES WITH ROCKWOOL AND COMPOST COMBINATIONS

T.E. Bilderback | W.C. Fonteno

32. STANDARDS OF PHYSICAL PROPERTIES FOR SUBSTRATES FOR CUTTINGS

Th.G.L. Aendekerk

33. WATER EXPLOITATION IN SUBSTRATE PROFILE DURING CULTURE

F.X. Martínez | N. Cañameras | F.X. Fábregas | M. Viñals | J. Valero | M. Reis

34. ANALYSIS OF MACRO- AND TRACE ELEMENTS IN HORTICULTURAL SUBSTRATES BY MEANS OF THE CaCl₂/DTPA METHOD

D. Alt | I. Peters

35. GROWTH AND NUTRIENT CONTENT OF PELARGONIUM GROWN IN CORK OAK BARK SUBSTRATE

M.T. Aguado | M.C. Ortega | M.T. Moreno | M.P. Suarez

36. INFLUENCE OF THE SUBSTRATES ON THE DIRECT ROOTING OF EX VITRO, MM106 APPLE MICROCUTTINGS.

D. Avanzato | S. Cherubini

37. COMPARISON OF OPEN AND CLOSED GROWING METHODS ON PEAT AND ROCKWOOL AND THE LEACHING OF NUTRIENTS

M.-L. Bartosik | K. Salonen | R. Jokinen | K.R. Hukkanen

38. ROOT GROWTH AND QUALITY RATING OF SCHEFFLERA “GOLDEN CAPELLA” AND FICUS “STARLIGHT” ON SEVERAL PEAT-BASED SUBSTRATES.

M.C. Cid | A.R. Socorro | L. Perez-Rosales

39. RELATIONS BETWEEN PHYSICAL AND CHEMICAL PROPERTIES OF THE SUBSTRATE AND GROWTH OF SOME POT ORNAMENTALS

G. D'Angelo | M. Castelnuovo | A. Galli | M. Valagussa

40. SUPPLEMENTARY LIQUID FEEDING ON ORNAMENTAL SHRUBS GROWN IN MEDIA AMENDED WITH SLOW RELEASE FERTILIZERS

F.X. Fabregas | F.X. Martinez | A. Martinez | M. Viñals

41. GROWTH OF FOUR NATIVE LAVANDULA SPECIES IN DIFFERENT SUBSTRATES

D. Lopez | N. Carazo | J. Boadas

42. THE USE OF FINE-GRADE PERLITES IN LETTUCE BAG CULTURES. II. PHYSICAL PROPERTIES, RHEOLOGIC EFFECTS AND PRODUCTIVITY.

O. Marfà | A. Martinez | R. Orozco | L. Serrano | F.X. Martinez

43. EFFECTS OF FERTILIZER PLACEMENTS AND IRRIGATION FREQUENCIES ON GROWTH, MINERAL NUTRITION AND YIELD OF TOMATOES GROWN IN SOILESS CULTURE

I.Mohd. Razi | H. Hasni

44. CHOICE OF GROWING MEDIA FOR POT PLANTS

O. Reinikainen

45. CHARACTERIZATION OF COMPOSTED PRUNING MATERIALS FROM URBAN GARDENS.

M. Soliva | D. Villalba | B. Vilarasau | M. Arbiol